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A Field Trip to the Sky (Demo)
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Mac_Sunburst_AFieldTripToTheSky-Demo.iso
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00114_Field_Page T2 55.txt
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1996-03-21
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261b
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During all this time, the planet was cratered by meteoroids falling toward the Sun. Mercury's largest crater is called the Caloris Basin. It's about 800 miles (1300 km) across. Magma continued to flow forming plains within and around the craters.